.main-container {
    background-color:#f3f3f3;
    margin: 0 auto;
    width:80%;
    position:relative;
}
#contact-detail {
    position:absolute;
    top:0;
    right:0;
    width:68%;
    height:100%;
    border: 1px solid #434343;
}
.contact-list {
    width : 30%;
}
.contact-brief {
    border: 1px solid #434343;
    padding: 20px;
    margin-bottom:10px;
    cursor:pointer;
}